AutoCodes – GMC – B125A 2015 GMC Sierra

B125A 2015 GMC Sierra Code - Antenna Signal Circuit

Quick Answer

The digital radio receiver, located inside the radio, receives digital radio information from the digital radio antenna located on the outside of the vehicle. Common causes include Faulty Radio Unit, Faulty Coax Cable, Faulty Cellular Phone, Navigation, and Digital Radio Antenna. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B125A 2015 GMC Sierra indicates Antenna Signal Circuit.
Common causes: Common causes include Faulty Radio Unit, Faulty Coax Cable, Faulty Cellular Phone, Navigation, and Digital Radio Antenna.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 278

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 29, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B125A 2015 GMC Sierra Description

The digital radio receiver, located inside the radio, receives digital radio information from the digital radio antenna located on the outside of the vehicle. The digital radio receiver is connected to the digital radio antenna via a shielded coax cable. The digital radio antenna contains an amplifier that is powered by the radio through the coax cable. The Diagnostic Trouble Code (DTC) will be set when the radio detects a circuit fault in the digital radio antenna.

OBDII Code B125A 2015 GMC Sierra - Antenna Signal Circuit - AutoCodes.com — B125A 2015 GMC Sierra Code - Antenna Signal Circuit

What does this mean?

What are the Possible Causes of the DTC B125A 2015 GMC Sierra?

Faulty Radio Unit
Faulty Coax Cable
Faulty Cellular Phone, Navigation, and Digital Radio Antenna

How to Fix the DTC B125A 2015 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

B125A:04 Antenna Signal Circuit Short to Battery
B125A:02 Antenna Signal Circuit Short to Ground
B125A:04 Antenna Signal Circuit Open

Poor AM and FM radio reception may be due to multiple influences, some of which may not be vehicle related. Areas that have high RF traffic or block the signal path may cause a degradation in radio reception. Radio reception may also be influenced by items within the vehicle, but not part of the radio system. Such examples are aftermarket electrical accessories or other items which may generate noise in the vehicle's electrical system. Aftermarket window tinting, especially when there is metallic in the film, may reduce radio reception.
AM reception is highly dependent on the antenna amplifier receiving battery voltage from the radio and being properly grounded. The antenna base has a built-in antenna amplifier that boosts both AM and FM reception. When the antenna amplifier does not receive power, AM stations may not be received, and FM reception will be limited. If the antenna base is not properly grounded, excessive interference in the signal may occur or reception may be limited.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B125A 2015 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B125A 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code B125A in a 2015 GMC Sierra related to the Antenna Signal Circuit?

The common symptoms include poor radio reception, intermittent loss of radio signal, and possible issues with other wireless features in the vehicle.

2. What could cause OBDII code B125A to trigger in a 2015 GMC Sierra's Antenna Signal Circuit?

Possible causes include a faulty antenna, damaged antenna cable, loose connections, or issues with the radio module or wiring.

3. How can I diagnose the Antenna Signal Circuit problem causing OBDII code B125A in my 2015 GMC Sierra?

You can start by visually inspecting the antenna and its connections for any visible damage. Using a multimeter, check for continuity and proper signal transmission along the antenna circuit.

4. Are there any DIY repair tips for fixing OBDII code B125A in a 2015 GMC Sierra's Antenna Signal Circuit?

If the issue is a loose connection, you can try securing the connections properly. If the antenna or cable is damaged, replacement will be necessary. However, complex repairs may require professional assistance.

5. Can a malfunctioning Antenna Signal Circuit affect other vehicle systems in a 2015 GMC Sierra?

Yes, a faulty Antenna Signal Circuit can impact not only the radio reception but also other wireless systems in the vehicle, such as GPS, keyless entry, and tire pressure monitoring systems.

6. Is it safe to continue driving a 2015 GMC Sierra with OBDII code B125A related to the Antenna Signal Circuit?

While it may be safe to drive the vehicle with this code, it's essential to address the issue promptly to prevent any potential problems with communication systems and overall vehicle functionality.

7. How much can I expect to pay for repairing OBDII code B125A in a 2015 GMC Sierra's Antenna Signal Circuit?

The cost of repairs can vary depending on the exact cause of the issue and whether you choose to DIY or seek professional help. Antenna replacements and wiring repairs may range from $100 to $300 or more.

8. Can resetting the OBDII code B125A in a 2015 GMC Sierra clear the issue with the Antenna Signal Circuit?

Resetting the code may temporarily clear the error from the system, but if the underlying problem with the Antenna Signal Circuit is not resolved, the code is likely to reappear.

9. Are there any preventive measures to avoid OBDII code B125A in a 2015 GMC Sierra's Antenna Signal Circuit?

Regularly inspecting the antenna and its connections for damage, ensuring proper maintenance of the vehicle's electrical system, and addressing any issues promptly can help prevent this code from appearing.

10. How long does it typically take to repair OBDII code B125A in a 2015 GMC Sierra's Antenna Signal Circuit?

The repair time can vary based on the complexity of the issue and the availability of parts. Simple fixes like securing loose connections may take minutes, while more involved repairs could require several hours or more.